TransmittalsPub. 100-04, Medicare Claims Processing April 2022 Update of the Ambulatory Surgical Center (ASC) Payment System, Trans. 11303 (March 24, 2022) April 2022 Update of the Hospital Outpatient Prospective Payment System (OPPS), Trans. 11305 (March 24, 2022) April 2022 Integrated Outpatient Code Editor (I/OCE) Specifications Version 23.1, Trans. 11304 (March 24, 2022) This document is only available to subscribers. Please log in or purchase access. Purchase Login